HYPERPHEN®-50 TABLETS

Country: South Africa

Language: English

Source: South African Health Products Regulatory Authority (SAHPRA)

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                                INDICATIONS [/za_1267.html#1]
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CONTRA-INDICATIONS [/za_1267.html#1]
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DOSAGE [/za_1267.html#1]
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SIDE-EFFECTS [/za_1267.html#1]
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PREGNANCY [/za_1267.html#1]
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OVERDOSE [/za_1267.html#1]
    
IDENTIFICATION [/za_1267.html#1]
  [/za_1267.html#1]    PATIENT INFORMATION
HYPERPHEN®-10 TABLETS
HYPERPHEN®-50 TABLETS
SCHEDULING STATUS:
S3
PROPRIETARY NAME:
(and dosage form)
HYPERPHEN
®
-10 TABLETS
HYPERPHEN
®
-50 TABLETS
COMPOSITION:
Tablets containing
a) 10 mg 
HYDRALLAZINE 
Hydrochloride
b) 50 mg Hydrallazine Hydrochloride.
PHARMACOLOGICAL CLASSIFICATION:
A7.1.3 Other hypotensives.
PHARMACOLOGICAL ACTION:
The major action of hydrallazine is direct relaxation of vascular smooth muscle with a greater effect on arterioles than
on veins. Therefore in adequate doses it decreases arterial blood pressure, diastolic often more than systolic, and
peripheral vascular resistance, and increases heart rate, stroke volume, and cardiac output. The preferential dilatation
of arterioles, minimizes postural hypotension and promotes the increase in cardiac output. The latter may limit the
reduction in mean blood pressure produced by the drug. The peripheral vasodilatation is widespread but not uniform.
Glomerular filtration, renal tubular function, and urine volume are not consistently affected; however, in common with
many other hypertensive agents, hydrallazine can produce sodium retention and decreased urine volume. Hydrallazine
usually increases plasma renin activity. Vascular resistance in the cutaneous and muscle beds may decrease, but this
is usually in parallel with the fall in blood pressure and blood flow does not increase.
Effects of hydrallazine on organs other than those of t
                                
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